I have a 2012 Silverado 6.2L supercharged running a little over 11psi, cam, headers, stalled, meth and an 8 rib set up. I got it dyno tuned put down 598/592 and its out of fuel. I need injectors and a fuel pump. But from what I read you can't run a boost a pump on these flex fuel trucks? So what in tank pump would be my best bet? My fuel pressure dropped to about 42psi on that dyno pull and my injectors were maxed out so time to throw some 80lb injectors in it and try and figure out a pump set up but I never worked with flex fuel and the electronics with it. Thanks!

 

There are a lot of write ups on converting to return or pump swaps in a returnless over in the Fuel Systems section. If you decide to stay returnless go with a Walbro 450 as it is PWM and will work with your FPCM like your stock pump did. You still need to decide how you get the fuel to your bigger pump, no use having a bigger pump if it dries out the bucket. Atomic has stickys on fuel supply and common pumps capacity.

 

Just install a walbro 450 in your flex fuel bucket and ride. Works for me.

 

I have two walbro 450s now check out my build to see how I did it.

 

Ok thanks guys! How much hp is a single 450 good till?

 

See Atomic's sticky in link below. He has graph that shows about ballpark 750 hp at 13.5 V and 58 psi which is gasoline. You will need more fuel for E85.

https://www.performancetrucks.net/fo...p-flow-510434/